salix/modules/order/front/index/index.js

import ngModule from '../module';
import Section from 'salix/components/section';

export default class Controller extends Section {
    preview(order) {
        this.selectedOrder = order;
        this.$.summary.show();
    }
}

ngModule.component('vnOrderIndex', {
    template: require('./index.html'),
    controller: Controller
});